mash: Disable ash_sysui; begin removal.

ash/public/interfaces/wallpaper.mojom

Index: ash/public/interfaces/wallpaper.mojom
diff --git a/ash/sysui/public/interfaces/wallpaper.mojom b/ash/public/interfaces/wallpaper.mojom
similarity index 74%
rename from ash/sysui/public/interfaces/wallpaper.mojom
rename to ash/public/interfaces/wallpaper.mojom
index af7b7128db1f31169005e373858f9db7767d15b1..d2bbad32f6fb25cdf2e48b5513e16fd987ac5085 100644
--- a/ash/sysui/public/interfaces/wallpaper.mojom
+++ b/ash/public/interfaces/wallpaper.mojom
@@ -2,19 +2,19 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-module ash.sysui.mojom;
+module ash.mojom;
 
 import "skia/public/interfaces/bitmap.mojom";
 
 // These values match wallpaper::WallpaperLayout.
 enum WallpaperLayout { CENTER, CENTER_CROPPED, STRETCH, TILE, };
 
-// Used by Chrome to set the wallpaper displayed by ash_sysui.
+// Used by Chrome to set the wallpaper displayed by ash.
 interface WallpaperController {
   SetWallpaper(skia.mojom.Bitmap wallpaper, WallpaperLayout layout);
 };
 
-// Used by ash_sysui to trigger Chrome's wallpaper picker functionality.
+// Used by ash to trigger Chrome's wallpaper picker functionality.
 interface WallpaperManager {
   Open();
 };